js处理手机号中间4位替换成*

1.使用substr $(function() {    var phone = $('#phone').text();    var mphone = phone.substr(0, 3) + '****' + phone.substr(7);    $('#phone').text(mphone)});2.使用正则表达式var lphone = phone.replace(/^(\d{4})\d{4}(\d+)/,"$1****$2");